Inserted pump barrel and sealing means



March 31, 1931. J YERKES ET AL 1,798,295

INSERTED PUMP BARRFIT. AND SEALING MEANS File-d July 19. 1928 2 Sheets-Sheet l 7 EM"? ms a 4% q- 0 {14 .1 v a Z 24 iiiii" i w w \nfl/ A I 5 gum A 30 {ELL-.11

' INVENTOR. Z Z 3/ ab 1 a. Yerkes Z??? 24 #5 BY Fees H Lemma/7 774MM77MZ TTORNEY 3/ 25 A J March 31, 1931. J. A. YERKES ET AL INSERTED PUMP BARREL AND SEALING MEANS Filed July 18, 1928 2 Sheets-Sheet 2 0 &a mi m m vvee /h ha Z P w A TTORNEYJ Patented Mar. 31, 1931 UNITED STATES PATENT OFFICE JOHN YERKES AND REES H. LEMMON, F LONG BEACH, CALIFORNIA INSERTED PUMP BARREL AND SEALING MEANS Application filed July 18, 1928. Serial No. 293,655.

iChis invention relates to a means for sealing an inserted well pump in pump tubing or the like so as to permit insertion and withdrawal, and pertains more particularly to .5 sealing means comprising shoes and seats disposed between the pump barrel and tubmg. I

In inserted well pumps, the working barrel is lowered into operating position within in the'pump tubing. The barrel is of less diameter than the tubing and there is an annular space formed between the barrel and tubing. Such working barrels are commonly supported on a shoe provided in the tubing, and such shoe in cooperation with a seat on the barrel forms a fiuid tight seal which separates the contents of the well below the barrel from that above. A dead annular space is thus formed about the barrel, where solid matter, such as sand may lodge. This sand settling into the space from the column of liquid being elevated causes the barrel to become tightly wedged or frozen in position making it diflicult to withdraw the pump from the tubing. The present invention contemplates a sealing means at the upper end of the barrel and a lower sealing means. In some constructions heretofore contemplated, a pair of hard seats and shoes have an been provided for this purpose and these seats and shoes are currently made of metal. Due to variations in the spacing of seats and of shoes, stretching and expansion of tubing and other factors, it is diificult to provide fluid seals at both seats, unless provision is made for adjustment of either the shoes, the seats, or both. In our copending application, Ser. No. 162,710, filed Jan-22, 1927 for compensating packing for inserted pumps, W a means is disclosed wherein the seats on the pum barrel are automatically longitudinal- 1y ajustable to the shoes on the tubing to compensate for variations in spacing. The present invention appertains to a structure M of a similar nature in which the seats accommodate themselves to the spacing.

The objects of this inventipn are to provide a structure of the character described with an or all of the following features tubing aving spaced shoes, one or more of which is axially urged to or from the other to cooperate with corresponding seats on an inserted pump barrel; a shoe axially urged by resilient means to or from a shoe stationary in position in the tubing; and releasable locking means for anchoring the barrel in the tubing and forcing the seats thereon toward their shoes and holding them in seated posi- These objects together with other objects and correspondin accomplishments are obtained by means oi the embodiment of our invention illustrated in the accompanying drawings, in which Fig. 1 is an axial section through a fragment of oil tubing provided with shoes, the upper one of which is axially movable, a releasable locking means, and an inserted pump barrel being shown in elevation; Fig. 2 is an elevation partly in section of the locking sleeve; Fig. 3 is a view similar to Fig. 1, showing the bottom shoe movable; Fig. 4 is an axial section on an enlarged scale of the top shoe shown in Fig. 1 with the shoe in position before the Fpump is seated; Fig. 5 is a view similar to 1g. 4 showing theshoe moved into position compressing the retaining spring, as may be the case when the pump is seated in the shoe; and Fig. 6 shows a modified form of shoe including a packing.

Referring more particularly to Figs. 1, 2, 4 and 5, a fragment of a string of oil well tubing is shown com rising joints of tubing 10 and 11 connected y a retaining collar 12. Con

nected to the lower end of the joint 11 is a fixed shoe 13, and secured to shoe 13 is a retaining collar 14 adapted to be connected to the-lower elements of the string. Disposed within the strin a ing sleeve 15. Disposed within the retaining collar 12 is a sliding shoe 16.

Within the string is a working barrel 17 of an inserted ump having tapered seats 18 and 19 thereon xed in spaced position. Depending'from the barrel is a tail member 20 cooper atmg with the locking sleeve. v

The fixed shoe 13-l1as a perforate bore 21 and between the shoe 13 and collar 14 is corresponding to the tapered seat 19. The

lower end of the shoe is reduced in diameter and threaded to receive the collar 14, the htter being provided with an internal flange 22 to provide a clamping shoulder. Clamped in position between the shoe and shoulder is the flange 23 of the locking sleeve. The locking sleeve is preferably made of spring steel slit longitudinally to provide spring leaves 24 having inwardly projecting tips 25 ar-- ranged in ring form.

The upper retaining collar has an internal flange 26 providing a shoulder cooperating with the upper edge of tubing joint 11 to provide a space for receiving the slidable shoe l6 and a compression spring 27. The shoe has a tapered bore 28 corresponding to the tapered seat 18. The construction is such as to permit the shoe 16 to be moved from the position shown in Fig. 4 into a lower position against the action of spring 27 as shown in Fig. 5.

A sucker rod 29 is shown for operating the plunger of the pump and for elevating and lowering the pump barrel into position. The tail piece 20 on the pump barrel is provided with an annular recess 30 to receive the tips 25 of the locking leaves. The lower faces of the tips are bevelled as indicated by 31 to co operate with a corresponding bevelled portion of the recess 30. The construction is such that when the pump: barrel seats in shoe 13, the tips of the leaves will have entered the recess 30 and the lower bevelled faces of the tips will press downwardly upon the tail piece forcing the barrel to its seat and holding it in position. A releasable lock is thus provided so that by pulling upwardly upon the sucker rod 29, the locking sleeve 15 will be caused to release its hold upon the tail piece and the pump barrel may be withdrawn upwardly through the tubing. In seated position of the pump barrel, the sliding shoe 16 will accommodate itself to the seat 18, thereby providing a fluid tight seal. The annular space 32 is thus efl'ectively sealed from the fluid both above and below the pump barrel, and no opportunity for the settling of sand or other foreign matter therein is provided. The sliding shoe 16 has sufficient travel to provide for inaccuracies of assembly of parts, dimensions of the tubing and pump structure and variations after seating of the pump barrel.

In Fig. 6, a sliding shoe is shown composed of sections 33 and 34 slidably secured together so as to provide a recess for packing rings 35.

- Referring more particularly to Fig. 3, the joints of tubing 10 and 11 are connected by a fixed shoe 36 having a tapered bore corresponding to seat 18. The upper shoe is thusfixed in position. Secured to the lower end of joint 11 is a retaining collar 37 provided with an internal shoulder. Threaded into the lower end of the retaining collar is a nipple 38, and attached to the lower end of the nipple is a lock sleeve retaining collar 39 having a 'shoulder for cooperating with the nipple to clamp the lock sleeve 15 in posivvention.

What we claim is 1. In combination, a well tube including a lower shoe and an upper shoe, a pump barrel inserted in said tube, said pump barrel having spaced seats for seating on said shoes, one

of said shoes being yieldable in a direction axial of said tube to accommodate said shoe to its seat.

2. In combination, a well tube having a lower shoe and an upper shoe, a pump barrel inserted in said tube, said pump barrel having spaced seats for seating on said shoes, one of said shoes being yieldable in a direction axial of said tubeto accommodate said shoe to its seat, and releasable means coacting between said barrel and said tube to hold and press said seats in an axial direction against said shoes.

3. In combination, a well tube having a lower shoe and an upper shoe, a pump barrel inserted in said tube, said pump barrel having spaced seats for seating on said shoes, one of said shoes being resiliently urged in a direction axial of said tube to engage and follow its coacting seat so as to accommodate said shoes to said seats.

4. In combination, a well tube having a lower shoe and an upper shoe, a pump barrel inserted in said tube, said pump barrel having spaced seats for seating on said shoes, one of said shoes being resiliently urged in a direction axial of said tube to engage and follow its coacting seat so as to accommodate said shoes to said seats, and releasable means coacting between said barrel and tube to hold and press said seats in an axial direction against said shoes.

5. In combination, a well tube having a lower shoe and an upper shoe, a pump barrel inserted in said tube, said pump barrel having spaced seats for seating on: said shoes, one of said shoes being mounted in said tube to be movable axially thereof, resilient means urging said last mentioned shoe with relation to its coacting seat so as to follow the latter and form a fluid tight seal therewith.

6. In combination, a ,well tube having a lower shoe and an upper shoe, a pump barrel inserted in said tube, said pump barrel having spaced seats for seating on said shoes, one of said shoes being mounted in said tube to be movable axially thereof, resilient means urging said last mentioned shoe with relation to its coacting seat so as to follow the latter and form a fluid tight seal therewith, and releasable means coacting between said barrel and tube to hold and press said seats in an axial directionagainst said shoes.

7. In combination, a well tube having a lower shoe and an upper shoe, a pump barrel inserted in said tube, said pump barrel having spaced seats for seating on said shoes, one of said shoes being yieldable in the direction axial of said tube to accommodate saidlast mentioned shoe to its coacting seat,

the other of said shoes being stationary with relation to said tube.

8. In combination, a well tube having a lower shoe and an upper shoe, a pump barrel inserted in said tube, said pump barrel having spaced seats for seating on said shoes, one of said shoes being yieldable in a direction axial of said tube to accommodate said last mentioned shoe to its seat, the other of said shoes being stationary with relation to said tube and releasable means coacting between said barrel and tube to hold and press said seats in an axial direction against said shoes.

9. In combination, a Well tube having a lower shoe. and an upper shoe, a pump barrel inserted in said tube, said pump barrel having spaced seats for seating on said shoes,

one of said shoes being resiliently urged in a direction axial of said tube to engage and follow its coacting seat so as to accommodate said last mentioned shoe to its seat, the other oftsaid shoes being stationary with relation to said tube. I

10.= In combination, a well tube having a pair of spaced shoes adapted to receive an inserted pump barrel and forming a unit with said well tube, one of said shoes being .resiliently urged in a direction axial of said tube.

11. A well tube string unit comprising, a

well tube, a shoe movably mounted therein, and resilient means supported on said tube urging said shoe in a direction axial of said shoe. v

12. A well tube string unit comprising, a well tube, a shoe slidably mounted therein for movement in a direction axial of said tube, said tube being provided with means limiting the travel of said shoe, and a comression spring supported on said tube urging said shoe toward one limit of its travel. In witness that we claim the foregoing we have hereunto subscribed our names.

-REES I-I. LEMMON. JOHN A. YERKES. 

